He's clearly outstanding on clay, and much less impressive on all the other surfaces. I personally prefer, someone who's more EVEN, like the other 3.
irrelevant what you prefer. there are a lot of big clay tournaments which means the H2H is significant stat to consider.
regardless of the surface, it is what it is. and of course he has beaten them all on hard court and grass too so it is sort of irrelevant. there are multiple surfaces that is part of the sport. if take away hard court from Murray and Djokovic then they would have almost no wins against Nadal so.
and it's false that Nadal doesn't make it too many non-clay later rounds, obviously he does. in certain years he does well against competition at these stages, and certain years he gets demolished. regardless of fashion or surface, it is very rare and pretty incredible to have a winning H2H against practically every player on tour in your career (at least thus far). I don't think there ever has been a player who had almost a perfect H2H advantage +++++ against all significant players in the field before